Byrna Technologies CO2 Cartridge with Oiler - 10 Count
Byrna Technologies 8 Gram CO2 Cartridges comes in a 10-Pack with Oiler for simple maintenance. Each cartridge is good for 15-20 rounds, which is about 4 magazines with 5 rounds in each magazine. Once punctured, cartridges can leak over time. It's recommended to remove punctured cartridges and replace with an unpunctured cartridge inside, at the ready. The Byrna HD will puncture and fire the first round at the same time.